CM® Master Ring, Heat Treated, series: Herc-Alloy® 800, 2 in, 73500 lb, 80 Grade, Round, Alloy Steel, Orange Powder Coated. Master Rings are an Important Part of Most Rigging Applications and Can Be Used Universally Because of Their Round Configuration. CM® 554635 Herc-Alloy® 800 Heat Treated Master Ring, 2 in Trade, 73500 lb Load, 80 Grade, Round, Alloy Steel